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A circle has a circumference of 200 cm. What is its radius?

1 Answer

Apr 27, 2016

$\frac{100}{π} \approx 31.83$ $100/pi ~~ 31.83$

Explanation:

To solve this you need to know that the equation for the circumference is $2 π r$ $2pir$ where $r$ $r$ is the radius.
$2 π r = 200$ $2pir=200$

$r = \frac{200}{2 π} = \frac{100}{π} \approx 31.83$ $r=200/(2pi) = 100/pi ~~ 31.83$

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